LED stop/tail lamp arrays.

[Riejufixing]

The sort with multiple LEDs. I have seen one with only some of the LEDs working, not the same ones consistently though. On the same lamp, some of the brake light LEDs work, again not all consistently, and not all the same as the tail lamp LEDs. Cause? Fixable?

[steve the grease]

[A100man]

I just fxed one of those LED disco lights for my daughter. Needed a specific blue LED which I source from ebay for a couple of quid. You need to get the power/current correct though or it will 'blow' .. This was 1W and surpisingly bright i.e. you couldn't look directly at it..
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Now: A100, GT250A, XJ598, FZ750

Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600

[Riejufixing]

[Easy-X]

How about metal fatigue on the circuit board due to poor quality soldering i.e. dry joints. Any change in the pattern if you belt it tap it lightly?
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[Riejufixing]

[Robby]

I would expect the problem is just poor connections for the individual LEDs.

LEDs are cheap. Well-made LED lights are expensive, and it's a fairly new technology in automotive terms. That would suggest that it's fairly difficult/expensive to do it right, but very cheap/easy to do it badly.

Consider that a normal incandescent bulb and holder has quite big contacts, a spring clip to hold the bulb in place, and some way of absorbing vibration. A soldered LED does not, and the fashion is to cram loads of them together. Vibration is going to break stuff.

[Easy-X]

Standard practice from the units I've seen is to have say 30 LEDs. Running light switches on 10 in bank 1 and brake switches on the other 20 in bank 2.
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[WD Forte]

Robby sez
"LEDs are cheap. Well-made LED lights are expensive, and it's a fairly new technology in automotive terms. That would suggest that it's fairly difficult/expensive to do it right, but very cheap/easy to do it badly"

Yep

You gets what you pays for
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bikers smell of wee

[Fizzer Thou]

Having had several ordinary glass envelope bulbs break on my KTM enduro I opted for LED tail and brake lights.At first these looked quite fragile so I filled the gaps between the LEDs with clear silicone and cleared the excess from the tips of the components.These have worked a lot better than ordinary bulbs.

But on my Exup-R,although still looking okay and working the same as on the KTM,a friend who was following me on one occasion pointed out that the light from the back was much brighter when I was obviously accelerating.Once home I checked everything was okay,which they did visually.But instead I opted to replace them with original type glass bulbs and it has been okay since.

I bought my LED bulbs from Halfreuds and they would have lasted over 20,000 miles.
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Just talk bikes.What else is there?

Always have a 'Plan B'